 /*******************************************************************************
  * Copyright (c) 2000, 2006 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.ui.actions;

 import org.eclipse.jface.action.Action;
 import org.eclipse.jface.dialogs.IDialogSettings;
 import org.eclipse.jface.viewers.ISelection;
 import org.eclipse.jface.viewers.IStructuredSelection;
 import org.eclipse.jface.viewers.StructuredSelection;
 import org.eclipse.jface.wizard.WizardDialog;
 import org.eclipse.swt.widgets.Shell;
 import org.eclipse.ui.ISharedImages;
 import org.eclipse.ui.IWorkbench;
 import org.eclipse.ui.IWorkbenchWindow;
 import org.eclipse.ui.PlatformUI;
 import org.eclipse.ui.internal.dialogs.NewWizard;
 import org.eclipse.ui.internal.ide.IDEWorkbenchMessages;
 import org.eclipse.ui.internal.ide.IDEWorkbenchPlugin;
 import org.eclipse.ui.internal.ide.IIDEHelpContextIds;
 import org.eclipse.ui.internal.registry.WizardsRegistryReader;

 /**
  * Standard action for launching the create project selection
  * wizard.
  * <p>
  * This class may be instantiated; it is not intended to be subclassed.
  * </p>
  */
 public class NewExampleAction extends Action {

     /**
      * The wizard dialog width
      */
     private static final int SIZING_WIZARD_WIDTH = 500;

     /**
      * The wizard dialog height
      */
     private static final int SIZING_WIZARD_HEIGHT = 500;

     /**
      * The workbench window this action will run in
      */
     private IWorkbenchWindow window;

     /**
      * This default constructor allows the the action to be called from the welcome page.
      */
     public NewExampleAction() {
         this(PlatformUI.getWorkbench().getActiveWorkbenchWindow());
     }

     /**
      * Creates a new action for launching the new project
      * selection wizard.
      *
      * @param window the workbench window to query the current
      * selection and shell for opening the wizard.
      */
     public NewExampleAction(IWorkbenchWindow window) {
         super(IDEWorkbenchMessages.NewExampleAction_text);
         if (window == null) {
             throw new IllegalArgumentException ();
         }
         this.window = window;
         ISharedImages images = PlatformUI.getWorkbench().getSharedImages();
         setImageDescriptor(images
                 .getImageDescriptor(ISharedImages.IMG_TOOL_NEW_WIZARD));
         setDisabledImageDescriptor(images
                 .getImageDescriptor(ISharedImages.IMG_TOOL_NEW_WIZARD_DISABLED));
         setToolTipText(IDEWorkbenchMessages.NewExampleAction_toolTip);
         PlatformUI.getWorkbench().getHelpSystem().setHelp(this,
                 org.eclipse.ui.internal.IWorkbenchHelpContextIds.NEW_ACTION);
     }

     /* (non-Javadoc)
      * Method declared on IAction.
      */
     public void run() {
         // Create wizard selection wizard.
 IWorkbench workbench = PlatformUI.getWorkbench();
         NewWizard wizard = new NewWizard();
         wizard
                 .setCategoryId(WizardsRegistryReader.FULL_EXAMPLES_WIZARD_CATEGORY);

         ISelection selection = window.getSelectionService().getSelection();
         IStructuredSelection selectionToPass = StructuredSelection.EMPTY;
         if (selection instanceof IStructuredSelection) {
             selectionToPass = (IStructuredSelection) selection;
         }
         wizard.init(workbench, selectionToPass);
         IDialogSettings workbenchSettings = IDEWorkbenchPlugin.getDefault()
                 .getDialogSettings();
         IDialogSettings wizardSettings = workbenchSettings
                 .getSection("NewWizardAction"); //$NON-NLS-1$
 if (wizardSettings == null) {
             wizardSettings = workbenchSettings.addNewSection("NewWizardAction"); //$NON-NLS-1$
 }
         wizard.setDialogSettings(wizardSettings);
         wizard.setForcePreviousAndNextButtons(true);

         // Create wizard dialog.
 Shell parent = window.getShell();
         WizardDialog dialog = new WizardDialog(parent, wizard);
         dialog.create();
         wizard.setWindowTitle(IDEWorkbenchMessages.NewExample_title);
         dialog.getShell().setSize(
                 Math.max(SIZING_WIZARD_WIDTH, dialog.getShell().getSize().x),
                 SIZING_WIZARD_HEIGHT);
         PlatformUI.getWorkbench().getHelpSystem().setHelp(dialog.getShell(),
                 IIDEHelpContextIds.NEW_PROJECT_WIZARD);

         // Open wizard.
 dialog.open();
     }
 }

